Monster Hunter Stories Save Editor Sauce

// Little lazy with this, but people seem to have been asking so hey, it's better than nothing.
// Little to no error checking, should probably make that clear.
// Anyway, this'll give you max money and max Mega Potions... Or Potions... It's one or the other.

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

struct SEditValues
{
    int offset;
    int value;
};

const SEditValues kMaxMoney = { 0x5B404, 9999999 };
const SEditValues kMaxMegaPotions = { 0x1A, 999 };

class CHexEditing
{

private:
    fstream file;

public:
    int LoadFile(string fileName);
    void CloseFile();
    void WriteToOffset(int offset, int value);
};

int CHexEditing::LoadFile(string fileName)
{
    file.open(fileName, ios::in | ios::out | ios::binary);
    if (file.is_open())
    {
        cout << "File Opened";
        return 0;
    }

    else
    {
        cout << "Unable to open file, is it in the same directory?" << endl;
        system("pause");        // Fight me.
        return 1;
    }
}

void CHexEditing::CloseFile()
{
    file.close();

    #ifdef _DEBUG
    if (!file.is_open()) cout << "File Closed";
    else cout << "File Not Closed";
    cout << endl;
    system("pause");
    #endif
}

void CHexEditing::WriteToOffset(int offset, int value)
{
    unsigned int valueToWrite = (unsigned int)value;

    file.seekp(offset);

    if (valueToWrite <= 0xFF)
    {
        file.put(valueToWrite);
        return;
    }

    else if (valueToWrite <= 0xFFFF)
    {
        unsigned short bytes[2];

        bytes[0] = (valueToWrite) & 0xFF;
        bytes[1] = (valueToWrite >> 8) & 0xFF;

        file.put(bytes[0]);

        file.seekp(offset + 1);
        file.put(bytes[1]);
    }

    else if (valueToWrite <= 0xFFFFFFFF)
    {
        unsigned short bytes[4];

        bytes[0] = (valueToWrite) & 0xFF;
        bytes[1] = (valueToWrite >> 8) & 0xFF;
        bytes[2] = (valueToWrite >> 16) & 0xFF;
        bytes[3] = (valueToWrite >> 24) & 0xFF;

        file.put(bytes[0]);

        file.seekp(offset + 1);
        file.put(bytes[1]);

        file.seekp(offset + 2);
        file.put(bytes[2]);

        file.seekp(offset + 3);
        file.put(bytes[3]);
    }

    else cout << "Look mango, that number is real big. Too big.";

    #ifdef _DEBUG
    cout << valueToWrite << " written to file." << endl;
    system("pause");
    #endif
}

int main()
{
    CHexEditing* monHun = new CHexEditing;
    string fileName = "mhr_game";
    int fileNumber;
    cout << "Please enter your file number (top file = 0, middle = 1, bottom = 2): ";
    cin >> fileNumber;
    fileName = fileName + to_string(fileNumber) + ".sav";

    if (monHun->LoadFile(fileName) == 1) return 0;                                      // If unable to load a file, exit app
    monHun->WriteToOffset(kMaxMoney.offset, kMaxMoney.value);
    monHun->WriteToOffset(kMaxMegaPotions.offset, kMaxMegaPotions.value);
    monHun->CloseFile();

    cout << "Yo dawg, we done here. You should have max money and Mega Potions.";
    cout << endl;
    system("pause");        // Fight me.
    return 0;
}